正中神经返支的解剖变异
Anatomical Variation of the Recurrent Motor Branch of the Median Nerve.
作者信息
Ahmed Kowsar A, Tuffaha Sami H
机构信息
Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
出版信息
Hand (N Y). 2024 Oct 18:15589447241284411. doi: 10.1177/15589447241284411.
Abstract
The recurrent motor branch (RMB) of the median nerve has commonly thought to originate proximal to the terminal digital branches, although its anatomical course and number may vary. We report a rare variation of the RMB that arose from the second common palmar digital nerve. The median nerve bifurcated into the first and second common palmar digital nerves distal to the transverse carpal ligament, with the RMB dividing from the second common palmar digital nerve and traveling retrograde to enter the abductor pollicis brevis muscle. This high origin variation may be at increased risk of injury during procedures of the hand.
摘要
人们通常认为正中神经的返支（RMB）起源于指终末支的近端，尽管其解剖走行和数量可能有所不同。我们报告了一例罕见的返支变异，其起源于第二掌侧总指神经。正中神经在腕横韧带远侧分为第一和第二掌侧总指神经，返支从第二掌侧总指神经分出并逆行进入拇短展肌。这种高位起源变异在手外科手术中可能有更高的损伤风险。
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